The Instinct 2.0 MIPS offers increased protection, great ventilation and low weight to give you the ultimate experience for long days in the mountains. Adjustable Ventilation: Our adjustable ventilation system is easy to use and enables you to control the amount of air coming in your helmet. Opening channels below the shell it can be fine-tuned to give you the exact amount of ventilation you need for maximized comfort. Boa Fit System: Engineered to push performance further, the Boa Fit System provides micro-adjustability for fully customized comfort and unmatched stability. Dial in your perfect fit, stay in the moment and ride with comfort with Boa. Mips Safety System The Mips safety system is a low-friction layer inside the helmet. Generally located between the padding and the EPS foam protective layer, it allows a multi-directional movement of 10-15mm on certain angled impacts, intended to help reduce rotational force to the head. It is engineered to work flawlessly with the helmet's design without compromising either the comfort, the ventilation or the fit. There are different Mips systems, but all consist of a low-friction layer between the helmet and the head that provide extra protection to your brain so you can focus on your activity, light-hearted. Features: AVID Progressive EPS Adjustable Ventilation Audio Kit Compatible BOA Fit System Lycra Lining Specifications: Fit: L-58-61, M-54-58, S-51-54 Weight: 400g Product Material: PC Frame Colour: Black Matte Lens Name: No Lens Reference Technologies: AVID Progressive EPS / Adjustable Ventilation / Audio Kit Compatible / BOA Fit System / Lycra Lining / MIPS Brain Protection System / Neck Roll / Removable And Washable Lining / Supplied With Carry Bag Available with RX: No Bolle Instinct 2.0 MIPS Ski Helmet